The hidden meaning of "smart" in "smart phone" and "smart light switch" actually implies something different, taken from the hard drive industry:
Self-Monitoring, Analysis and Reporting Technology (SMART)
The purpose of these devices seems to be total monitoring of its users. A "smart" home usually means the vendor knows the state of every light switch, every door sensor, every movement down to the millisecond. I'm just waiting for a group of burglars to break into such a database to determine when and where to break into houses.